Perhaps this is not what you're thinking about, it's even better!!!

Not a radio in the traditional sense. A radio automatically produced with an algorithm that derives midi music/melodies from the code of each task!
No extra burden on the servers, 'cause the algorithm could be implemented on the client side.

One unique song for each unique task!
For instance, If I run 8 tasks simultaneously, I will be able to play one of the 8 tracks associated with each task, switching between them as I wish. After some tasks finish and others are downloaded, the tracks associated with the former disappear and the tracks associated with the latter are generated and are available for the user to play. Perhaps there could be extra features such as downloading the song of one particular task or choosing the genre. Pretty cool, no?

---

Even better, some of those extra features could be channels for giving donations for the projects we're supporting and / or for the BOINC project.

---